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Finding the Fourth Proportional to 255,779.19, 383,655.15 and 78,286.32

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Solution

The fourth proportional to 255,779.19, 383,655.15 and 78,286.32 is: 117,425.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,779.19 : 383,655.15 = 78,286.32 : x
  2. Step 2: Convert to fraction form
    255,779.19/383,655.15 = 78,286.32/x
  3. Step 3: Cross multiply
    255,779.19x = 383,655.15 × 78,286.32
  4. Step 4: Simplify right side
    255,779.19x = 30,034,949,842.55
  5. Step 5: Solve for x
    x = 30,034,949,842.55/255,779.19
  6. Step 6: Final answer
    x = 117,425.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.